19984821252037 has 2 divisors, whose sum is σ = 19984821252038. Its totient is φ = 19984821252036.

The previous prime is 19984821252031. The next prime is 19984821252041. The reversal of 19984821252037 is 73025212848991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19772331598881 + 212489653156 = 4446609^2 + 460966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19984821252037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19984821252031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9992410626018 + 9992410626019.

It is an arithmetic number, because the mean of its divisors is an integer number (9992410626019).

Almost surely, 2^{19984821252037} is an apocalyptic number.

It is an amenable number.

19984821252037 is a deficient number, since it is larger than the sum of its proper divisors (1).

19984821252037 is an equidigital number, since it uses as much as digits as its factorization.

19984821252037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 19984821252037 in words is "nineteen trillion, nine hundred eighty-four billion, eight hundred twenty-one million, two hundred fifty-two thousand, thirty-seven".